From the Department of Anesthesia and Intensive Care, Aalborg University Hospital, Aalborg University, Aalborg (O.L.S., T.L.K., S.A.R., J.B., A.E.S.E., A.-S.H.L., R.L.P., E.C., T.C.G., M.T.B., B.S.R.), Zealand University Hospital, Køge (L.M.P., S.E., J.P.L., C.A., C.B.M.), Rigshospitalet (A.P., B.A.B., J. Wetterslev, I.-L.J., M.H.M., L.Q., M.-B.N.K.) and the Section of Biostatistics, Department of Public Health (T.L.), University of Copenhagen, Bispebjerg, and Frederiksberg Hospital (C.S.M., M. Hjort, L.K.B.) and the Copenhagen Trial Unit (J. White, J.E.), Copenhagen, Nordsjaellands Hospital, Hillerod (M.H.B., M.S.-L., M.K.K., M. Hindborg), Randers Hospital, Randers (T.G., H.B.), Aarhus University Hospital, Skejby North, Aarhus (L.H.M.Ø., M.A.T.), Zealand University Hospital, Roskilde (T.H., B.U.), Viborg Hospital, Viborg (C.G.S., N.M.-N.), Kolding Hospital, Kolding (A.C.B., M. Bäcklund), Hvidovre Hospital, Hvidovre (U.G.P.), Herlev Hospital, Herlev (A.S.A.), Horsens Hospital, Horsens (L.B.), Herning Hospital, Herning (R.R.W.), Holbæk Hospital, Holbæk (S.B.T.), and Slagelse Hospital, Slagelse (S.A.I.) - all in Denmark; the Department of Intensive Care and Department of Clinical Research, University of Basel, Basel (M.S., A.H., C.E.G., N.Z.), and the Department of Intensive Care, Inselspital, University of Bern, Bern (J.C.S.) - both in Switzerland; the Department of Perioperative, Intensive Care and Pain Medicine, Helsinki University Hospital, Helsinki (M.B., M.O.); the Department of Critical Care, University Medical Center Groningen, Groningen, the Netherlands (F.K., W.D.); the Departments of Anesthesia and Intensive Care and of Clinical Research, Rikshospitalet, Oslo University Hospital, Oslo (J.H.L., T.N.A.); the Department of Intensive Care, Cardiff University Hospital of Wales, Cardiff, United Kingdom (M.M.); and the Department of Anesthesia and Intensive Care, Landspitali University Hospital, Reykjavik, Iceland (K.M.T.).